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A kind of eu loaded bi2wo6 porous microsphere with good dispersibility and its preparation method and application

A porous microsphere, good dispersibility technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. Uneven heat distribution, slow heating rate and other problems, to achieve the effects of uniform and stable morphology, short preparation cycle and fast reaction speed

Active Publication Date: 2015-10-28
盐城恒源卫生材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the traditional hydrothermal synthesis method, the common conduction heating method is often used. This heating method has the disadvantages of slow heating rate, long reaction time, uneven heat distribution, and large temperature gradient, which seriously affects the synthetic powder. The nature of the body, particle size, etc.

Method used

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  • A kind of eu loaded bi2wo6 porous microsphere with good dispersibility and its preparation method and application
  • A kind of eu loaded bi2wo6 porous microsphere with good dispersibility and its preparation method and application
  • A kind of eu loaded bi2wo6 porous microsphere with good dispersibility and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Eu loading Bi with good dispersion 2 WO 6 A method for preparing porous microspheres, comprising the following steps:

[0031] Step 1: Weigh Bi(NO 3 ) 3 ·5H 2 O and Na 2 WO 4 2H 2 O was put into a beaker, and a certain amount of Eu(NO 3 ) 3 ·6H 2 O is added to the beaker, wherein the amount of Eu added x=4%, x=n Eu / (n Bi +n Eu )×100%, n Bi and n Eu are the molar amounts of Bi and Eu, respectively;

[0032] Step 2: Measure deionized water into the beaker, fully stir at room temperature for 20 minutes, and prepare a mixed solution, wherein Bi(NO 3 ) 3 ·5H 2 The concentration of O is 0.2mol / L, Na 2 WO 4 2H 2 The concentration of O is 0.1mol / L, and then ultrasonically disperse the mixed solution for 40 minutes, so that the raw materials are fully dissolved and dispersed evenly, and the precursor solution is obtained;

[0033] Step 3: Move the precursor liquid into the microwave hydrothermal reactor lined with polytetrafluoroethylene, control the fillin...

Embodiment 2

[0037] Eu loading Bi with good dispersion 2 WO 6 A method for preparing porous microspheres, comprising the following steps:

[0038] Step 1: Weigh Bi(NO 3 ) 3 ·5H 2 O and Na 2 WO 4 2H 2 O was put into a beaker, and a certain amount of Eu(NO 3 ) 3 ·6H 2 O is added to the beaker, where the amount of Eu added x=10%, x=n Eu / (n Bi +n Eu )×100%, n Bi and n Eu are the molar amounts of Bi and Eu, respectively;

[0039] Step 2: Measure deionized water and add it to the beaker, fully stir for 40min at room temperature, and prepare a mixed solution, in which Bi(NO 3 ) 3 ·5H 2 The concentration of O is 0.6mol / L, Na 2 WO 4 2H 2 The concentration of O is 0.3mol / L, and then the mixed solution is ultrasonically dispersed for 50 minutes, so that the raw materials are fully dissolved and dispersed evenly, and the precursor solution is obtained;

[0040] Step 3: Move the precursor solution into the microwave hydrothermal reactor lined with polytetrafluoroethylene, control ...

Embodiment 3

[0044] Eu loading Bi with good dispersion 2 WO 6 A method for preparing porous microspheres, comprising the following steps:

[0045] Step 1: Weigh Bi(NO 3 ) 3 ·5H 2 O and Na 2 WO 4 2H 2 O was put into a beaker, and a certain amount of Eu(NO 3 ) 3 ·6H 2 O is added to the beaker, wherein the amount of Eu added x=15%, x=n Eu / (n Bi +n Eu )×100%, n Bi and n Eu are the molar amounts of Bi and Eu, respectively;

[0046] Step 2: Measure deionized water and add it to the beaker, fully stir it at room temperature for 25 minutes, and prepare a mixed solution, in which Bi(NO 3 ) 3 ·5H 2 The concentration of O is 0.4mol / L, Na 2 WO 4 2H 2 The concentration of O is 0.2mol / L, and then the mixed solution is ultrasonically dispersed for 60 minutes, so that the raw materials are fully dissolved and dispersed evenly, and the precursor solution is obtained;

[0047] Step 3: Move the precursor liquid into the microwave hydrothermal reactor lined with polytetrafluoroethylene, ...

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Abstract

The invention relates to Eu-loaded Bi2WO6 porous microspheres with good dispersion, as well as a preparation method and application thereof. The preparation method comprises the steps of respectively dissolving bismuth nitrate pentahydrate, sodium tungstate dihydrate and europium nitrate hexahydrate in water, wherein the molar ratio of Bi to W is 2: 1, Eu content x=2%-20%, and x=nEu / (nBi+nEu)*100%; uniformly stirring, then performing ultrasonic dispersion to obtain a precursor solution, and performing heat preservation for 60-120min at the temperature of 160 DEG C-220 DEG C with the power of 300W by using a microwave hydrothermal method to obtain the Eu-loaded Bi2WO6 porous microspheres, wherein the main component is quadrature phase Bi2WO6, and the Bi2WO6 contains Er<3+>. The preparation method provided by the invention combines the advantages of microwave and hydrothermal methods, the process is simple and easy to control, the preparation period is short, and the synthesized Eu-loaded Bi2WO6 porous microspheres have the advantages of good dispersion, uniform and stable appearance, high porosity and good photocatalytic activity, and can be used for degrading organic matters.

Description

technical field [0001] The invention belongs to the field of functional materials, and relates to a kind of Eu loaded Bi with good dispersibility 2 WO 6 Porous microspheres and their preparation methods and applications. Background technique [0002] Since the physical and chemical properties are closely related to the shape, size and structure of the material, the design and preparation of new nanostructured materials can be used not only in basic scientific research, but also in many fields, such as bioimaging, catalysis, drug delivery, Sensors and surface-enhanced Raman scattering. [0003] Bismuth tungstate (Bi 2 WO 6 ) is a typical Aurivillius-type oxide, which consists of layered WO 6 Octahedral and bismuth oxide sheets are stacked alternately. Bi 2 WO 6 It is one of the simplest members of the Aurivillius oxide family with the general formula Bi 2 A n-1 B n o 3n+3 (A=Ca, Sr, Ba, Pb, Na, K; B=Ti, Nb, Ta, Mo, W, Fe; n depends on (A n-1 B n o 3n+3 ) 2- Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/31B01J35/10A62D3/17
Inventor 谈国强黄靖
Owner 盐城恒源卫生材料有限公司
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